Rockwell Automation 1783-WAPxxx Stratix 5100 Wireless Access Point User Manual - Manual (Page 595)

Rockwell Automation Publication 1783-UM006A-EN-P - May 2014 595
Glossary
The following terms and abbreviations are used throughout this manual. For
definitions of terms not listed here, refer to the Allen-Bradley Industrial
Automation Glossary, publication
AG-7.1 .
802.11 The IEEE standard that specifies carrier sense media access control and physical
layer specifications for 1- and 2-megabit-per-second (Mbps) wireless LANs
operating in the 2.4 GHz band.
802.11a The IEEE standard that specifies carrier sense media access control and physical
layer specifications for wireless LANs operating in the 5 GHz frequency band.
802.11b The IEEE standard that specifies carrier sense media access control and physical
layer specifications for 5.5 Mbps and 11 Mbps wireless LANs operating in the 2.4
GHz frequency band.
802.11g The IEEE standard that specifies carrier sense media across control and physical
layer specifications for 6, 9, 12, 18, 24, 36, 48, and 54 Mbps LANs operating in
the 2.4 GHz frequency band.
802.3af The IEEE standard that specifies a mechanism for Power over Ethernet (PoE).
The standard provides the capability to deliver both power and data over
standard Ethernet cabling.
access point A wireless LAN data transceiver that uses radio waves to connect a wired network
with wireless stations.
ad hoc network A wireless network composed of stations without Access Points.
antenna gain The gain of an antenna is a measure of the antenna’s ability to direct or focus
radio energy over a region of space. High gain antennas have a more focused
radiation pattern in a specific direction.
associated A station is configured for wireless communication with an access point.
backoff time The random length of time that a station waits before sending a packet on the
LAN. Backoff time is a multiple of slot time, so a decrease in slot time ultimately
decreases the backoff time, that increases throughput.
beacon A wireless LAN packet that signals the availability and presence of the wireless
device. Beacon packets are sent by access points and base stations; however, client
radio cards send beacons when operating in computer to computer (Ad Hoc)
mode.
BOOTP Boot Protocol. A protocol used for the static assignment of IP addresses to
devices on the network.
BPSK A modulation technique used by IEEE 802.11b-compliant wireless LANs for
transmission at 1 Mbps.
broadcast packet A single data message (packet) sent to all addresses on the same subnet.
CCK Complementary code keying. A modulation technique used by IEEE 802.11b-
compliant wireless LANs for transmission at 5.5 and 11 Mbps.